# Dr. Essam Roshdy El-Zahar

Assistant ProfessorSalman Bin Abdulaziz University, Saudi Arabia

**Highest Degree**

Ph.D. in Engineering Mathematics from Menoufia University, Menofia Governorate, Egypt

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Salman Bin Abdulaziz University, Saudi Arabia

**Highest Degree**

Ph.D. in Engineering Mathematics from Menoufia University, Menofia Governorate, Egypt

**Share this Profile**

100%

Numerical Analysis

62%

Differential Equations

90%

Computational Mathematics

75%

Mathematical Engineering

55%

Books

0

0

Chapters

0

0

Articles

37

37

Abstracts

3

3

- Salah, B., E.R. El-Zahar, A.F. Aljohani, A. Ebaid and M. Krid, 2019. Optical soliton solutions of the time-fractional perturbed Fokas-Lenells equation: Riemann-Liouville fractionalderivative. Optik, 183: 1114-1119.

CrossRef | Direct Link | - Khaled, S.M., E.R. El-Zahar and A. Ebaid, 2019. Solution of Ambartsumian delay differential equation with conformable derivative. Mathematics, Vol. 7. 10.3390/math7050425.

CrossRef | Direct Link | - Habib, H.M., A.M. Ebady and E.R. El-Zahar, 2019. A numerical modeling of heat and mass transfer for a falling film absorber. Int. J. Eng. Res. Technol., 12: 287-295.
- El-Zahar, E.R. and H. Demiray, 2019. Analytical solutions of cylindrical and spherical dust ion-acoustic solitary waves. Results Phys., Vol. 13. 10.1016/j.rinp.2019.02.090.

CrossRef | Direct Link | - El-Kabeir, S.M.M., E.R. El-Zahar, M. Modather, R.S.R. Gorla and A.M. Rashad, 2019. Unsteady MHD slip flow of a ferrofluid over an impulsively stretched vertical surface. AIP Adv., Vol. 9. 10.1063/1.5088610.

CrossRef | Direct Link | - Ebaid, A., E.R. El-Zahar, A.F. Aljohani, B. Salah, M. Krid and J.T. Machado, 2019. Exact solutions of the generalized nonlinear Fokas-Lennells equation. Res. Phys., Vol. 14. 10.1016/j.rinp.2019.102472.

CrossRef | Direct Link | - Ebaid, A., E.R. El-Zahar, A.F. Aljohani, B. Salah, M. Krid and J.T. Machado, 2019. Analysis of the two-dimensional fractional projectile motion in view of the experimental data. Nonlinear Dyn., 97: 1711-1720.

CrossRef | Direct Link | - Chamkha, A.J., A.M. Rashad, E.R. El-Zahar and H.A. El-Mky, 2019. Analytical and numerical investigation of Fe
_{3}O_{4}-water nanofluid flow over a moveable plane in a parallel stream with high suction. Energies, Vol. 12. 10.3390/en12010198.

CrossRef | Direct Link | - El-Zahar, E.R. and A. Ebaid, 2018. On computing differential transform of nonlinear non-autonomous functions and its applications. Italian J. Pure Applied Math., 40: 711-723.
- Demiray, H. and E.R. El-Zahar, 2018. Cylindrical and spherical solitary waves in an electron-acoustic plasma with vortex electron distribution. Phys. Plasmas, Vol. 25. 10.1063/1.5021729.

CrossRef | Direct Link | - Aljohani, A.F., R. Rach, E. El-Zahar, A.M. Wazwaz and A. Ebaid, 2018. Solution of the hyperbolic kepler equation by Adomian's asymptotic decomposition method. Rom. Rep. Phys., Vol. 70. .

Direct Link | - Aljohani, A.F., E.R. El-Zahar, A. Ebaid, M. Ekici and A. Biswas, 2018. Optical soliton perturbation with Fokas-Lenells model by Riccati equation approach. Optik, 172: 741-745.

CrossRef | Direct Link | - Ebaid, A., R. Rach and E. El-Zahar, 2017. A new analytical solution of the hyperbolic Kepler equation using the Adomian decomposition method. Acta Astronautica, 138: 1-9.

CrossRef | Direct Link | - Ebaid, A., B. Masaedeh and E. El-Zahar, 2017. A new fractional model for the falling body problem. Chinese Phys. Lett., Vol. 34. 10.1088/0256-307X/34/2/020201.

CrossRef | Direct Link | - El-Zahar, E.R., A.M.N. Ebady and H.M. Habib, 2016. An asymptotic semi-analytical method for third-order singularly perturbed boundary value problems. Global J. Pure Applied Math., 12: 253-263.

Direct Link | - El-Zahar, E.R., 2016. Piecewise approximate analytical solutions of high-order singular perturbation problems with a discontinuous source term. Int. J. Different. Eq., Vol. 2016. 10.1155/2016/1015634.

CrossRef | Direct Link | - El-Zahar, E. and S. El-Kabeir, 2016. Approximate analytical solution of nonlinear third-order singularly perturbed BVPs using homotopy analysis method-Pade method. J. Comput. Theor. Nanosci., 13: 8917-8927.

CrossRef | Direct Link | - El-Kabeir, S.M., E.R. El-Zahar and A.M. Rashad, 2016. Effect of chemical reaction on heat and mass transfer by mixed convection flow of casson fluid about a sphere with partial slip. J. Comput. Theor. Nanosci., 13: 5218-5226.

CrossRef | Direct Link | - Ebady, A.M., E.R. El-Zahar and A.M. Gelany, 2016. Piecewise rational approximate solutions of nonlinear transient circuits using adaptive step-size MsDTM-Pade method. J. Comput. Theor. Nanosci., 13: 5137-5142.

CrossRef | Direct Link | - El-Zahar, E.R., 2015. Applications of adaptive multi step differential transform method to singular perturbation problems arising in science and engineering. Applied Math. Inform. Sci., 9: 223-232.

CrossRef | Direct Link | - El-Zahar, E.R., Y.S. Hamed and H.M. Habib, 2014. A non-linear fifth order a-stable explicit one-step method for stiff systems arising in chemical reactions. Int. J. Pure Applied Math., 94: 341-354.

CrossRef | Direct Link | - Habib, H.M., E.R. El-Zahar and A.M. Ebady, 2013. Prediction of wavy liquid film profile for thin film on a falling film absorber. Applied Math., 4: 785-791.

CrossRef | Direct Link | - Habib, H.M. and E.R. El-Zahar, 2013. Mathematical modeling of heat-transfer for a moving sheet in a moving fluid. J. Applied Fluid Mechanics, 6: 369-373.
- El-Zahar, E.R., 2013. Approximate analytical solutions of singularly perturbed fourth order boundary value problems using differential transform method. J. King Saud Univ.-Sci., 25: 257-265.

CrossRef | - El-Zahar, E.R., 2013. A non-linear absolutely-stable explicit numerical integration algorithm for stiff initial-value problems. Am. J. Applied Sci., 10: 1363-1370.

CrossRef | Direct Link | - El-Zahar, E.R. and S.M.M. El-Kabeir, 2013. A new method for solving singularly perturbed boundary value problems. Applied Math. Inform. Sci., 7: 927-938.
- El Behady, E.E. and E.R. El-Zahar, 2013. Vibration reduction and stability study of a dynamical system under multi-excitation forces via active absorber. Int. J. Phys. Sci., 7: 6203-6209.

CrossRef | Direct Link | - El-Zahar, E.R., 2012. Approximate analytical solutions for singularly perturbed boundary value problems by multi-step differential transform method. J. Applied Sci., 12: 2026-2034.

CrossRef | - El-Zahar, E.R., 2012. An adaptive step-size taylor series based method and application to nonlinear biochemical reaction model. Trends Applied Sci. Res., 7: 901-912.

CrossRef | - El-Zahar, E.R. and H.M. Habib, 2012. Mathematical modeling of heat-transfer for a moving sheet situated in a moving cooling fluid with application to sheet industry. Int. J. Phys. Math. Sci., 3: 112-116.
- Ebady, A.M.N., H.M. Habib and E.R. El-Zahar, 2012. A fourth order a-stable explicit one-step method for solving stiff differential systems arising in chemical reactions. Int. J. Pure Applied Math., 81: 803-812.

Direct Link | - Abdou, M.M.M. and E.R. EL-Zahar, 2012. Variable viscosity effect on heat transfer over a continuous moving surface with variable internal heat generation in micropolar fluids. Applied Math. Sci., 6: 6365-6379.

Direct Link | - Hamed, Y.S., M. Sayed, S.K. Elagan and E.R. EL-Zahar, 2011. The improved (G/G )-expansion method for solving (3+1)-dimensional potential-YTSF equation. J. Mod. Methods Numerical Math., 2: 32-38.
- El-Zahar, E.R. and Y.S. Hassanein, 2011. An algorithm for solving second order nonlinear singular perturbation boundary value problems. J. Mod. Methods Numer. Math., 2: 21-31.

Direct Link | - Habib, H.M. and E.R. El-Zahar, 2010. A new algorithm for solving nonlinear stationary shock problems with mechanization. Applied Math. Inform. Sci., 4: 31-45.

Direct Link | - El-Zahar, E.R., 2010. An initial-value algorithm for solving a class of non-linear singularly perturbed two-point boundary-value problems. Proceedings of the 5th International Conference of Mathematics and Engineering Physics, May 25-27, 2010, Cairo, Egypt -.
- El-Zahar, E.R., I.M. El-Desoky, E.M. Zaky and A.M. El-Refeay, 2009. A computer algebra algorithm for asymptotic analytical solution of singular perturbation problems. Proceedings of the 1st International Conference Computer Science from Algorithms to Application, December 8-10, 2009, Cairo, Egypt -.
- Habib, H.M. and E.R. El-Zahar, 2008. Variable step size initial value algorithm for singular perturbation problems using locally exact integration. Applied Math. Comput., 200: 330-340.

CrossRef | - Habib, H.M. and E.R. El-Zahar, 2007. An algorithm for solving singular perturbation problems with mechanization. Applied Math. Comput., 188: 286-302.

CrossRef | - Habib, H.M. and E.R. El-Zahar, 2005. A software package of finite-difference methods for two-point boundary value problems. Proceedings of the 14th International Conference on Intelligent and Adaptive Systems and Software Engineering, July 20-22, 2005, Toronto, Canada -.